English verb conjugation
MUST STOPPER

Regular verb: stopper - stoppered - stoppered

Affirmation

Simple form	V-ing form
I must stopper you must stopper he must stopper we must stopper you must stopper they must stopper	I must be stoppering you must be stoppering he must be stoppering we must be stoppering you must be stoppering they must be stoppering
Perfect	V-ing perfect
I must have stoppered you must have stoppered he must have stoppered we must have stoppered you must have stoppered they must have stoppered	I must have been stoppering you must have been stoppering he must have been stoppering we must have been stoppering you must have been stoppering they must have been stoppering

Negation

Simple form	V-ing form
I mustn't stopper you mustn't stopper he mustn't stopper we mustn't stopper you mustn't stopper they mustn't stopper	I mustn't be stoppering you mustn't be stoppering he mustn't be stoppering we mustn't be stoppering you mustn't be stoppering they mustn't be stoppering
Perfect	V-ing perfect
I mustn't have stoppered you mustn't have stoppered he mustn't have stoppered we mustn't have stoppered you mustn't have stoppered they mustn't have stoppered	I mustn't have been stoppering you mustn't have been stoppering he mustn't have been stoppering we mustn't have been stoppering you mustn't have been stoppering they mustn't have been stoppering

Interrogative form

Simple form	V-ing form
must I stopper? must you stopper? must he stopper? must we stopper? must you stopper? must they stopper?	must I be stoppering? must you be stoppering? must he be stoppering? must we be stoppering? must you be stoppering? must they be stoppering?
Perfect	V-ing perfect
must I have stoppered? must you have stoppered? must he have stoppered? must we have stoppered? must you have stoppered? must they have stoppered?	must I have been stoppering? must you have been stoppering? must he have been stoppering? must we have been stoppering? must you have been stoppering? must they have been stoppering?

Interro-negative form

Simple form	V-ing form
mustn't I stopper? mustn't you stopper? mustn't he stopper? mustn't we stopper? mustn't you stopper? mustn't they stopper?	mustn't I be stoppering? mustn't you be stoppering? mustn't he be stoppering? mustn't we be stoppering? mustn't you be stoppering? mustn't they be stoppering?
Perfect	V-ing perfect
mustn't I have stoppered? mustn't you have stoppered? mustn't he have stoppered? mustn't we have stoppered? mustn't you have stoppered? mustn't they have stoppered?	mustn't I have been stoppering? mustn't you have been stoppering? mustn't he have been stoppering? mustn't we have been stoppering? mustn't you have been stoppering? mustn't they have been stoppering?